Spinach Artichoke Dip:

How to Make a Sourdough Bread Bowl

Start with a whole, unsliced, round loaf of sourdough bread. Cut the top
off, somewhere between a quarter and a third of the way down. With a
pairing knife make a cut 'round the inside of the loaf about 1 inch from
the crust. Now just reach in and "pull the plug." Be sure to cut up the
bread "plug" and lid for dippers.